[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PULL 3/5] virtio-gpu: Recalculate VirtIOGPU::hostmem on VM
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PULL 3/5] virtio-gpu: Recalculate VirtIOGPU::hostmem on VM load |
Date: |
Wed, 11 Jan 2017 11:28:35 +0100 |
From: Peter Maydell <address@hidden>
The 'hostmem' field in VirtIOGPU is used to track the total memory
used in pixmaps so that we can impose a maximum limit on it.
However this field is neither migrated nor recalculated on
VM load, which means that after a migration it will be incorrectly
too low, which can allow the guest to use more pixmap memory
than it should. The per-resource hostmem fields are not filled
in either as we reallocate them in the load function.
Recalculate the memory used for each pixmap and the total memory
used as we reallocate the pixmaps in virtio_gpu_load().
Signed-off-by: Peter Maydell <address@hidden>
Message-id: address@hidden
Signed-off-by: Gerd Hoffmann <address@hidden>
---
hw/display/virtio-gpu.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index ca88cf4..c3cf47e 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -1038,6 +1038,8 @@ static int virtio_gpu_load(QEMUFile *f, void *opaque,
size_t size)
uint32_t resource_id, pformat;
int i;
+ g->hostmem = 0;
+
resource_id = qemu_get_be32(f);
while (resource_id != 0) {
res = g_new0(struct virtio_gpu_simple_resource, 1);
@@ -1059,6 +1061,8 @@ static int virtio_gpu_load(QEMUFile *f, void *opaque,
size_t size)
return -EINVAL;
}
+ res->hostmem = PIXMAN_FORMAT_BPP(pformat) * res->width * res->height;
+
res->addrs = g_new(uint64_t, res->iov_cnt);
res->iov = g_new(struct iovec, res->iov_cnt);
@@ -1081,6 +1085,7 @@ static int virtio_gpu_load(QEMUFile *f, void *opaque,
size_t size)
}
QTAILQ_INSERT_HEAD(&g->reslist, res, next);
+ g->hostmem += res->hostmem;
resource_id = qemu_get_be32(f);
}
--
1.8.3.1
- [Qemu-devel] [PULL 0/5] vga patch queue, Gerd Hoffmann, 2017/01/11
- [Qemu-devel] [PULL 4/5] virtio-gpu: Fix memory leak in virtio_gpu_load(), Gerd Hoffmann, 2017/01/11
- [Qemu-devel] [PULL 5/5] virtio-gpu: tag as not hotpluggable, Gerd Hoffmann, 2017/01/11
- [Qemu-devel] [PULL 3/5] virtio-gpu: Recalculate VirtIOGPU::hostmem on VM load,
Gerd Hoffmann <=
- [Qemu-devel] [PULL 1/5] virtio-gpu: fix information leak in capset get dispatch, Gerd Hoffmann, 2017/01/11
- [Qemu-devel] [PULL 2/5] display: cirrus: ignore source pitch value as needed in blit_is_unsafe, Gerd Hoffmann, 2017/01/11
- Re: [Qemu-devel] [PULL 0/5] vga patch queue, Peter Maydell, 2017/01/12